120 THE CHEMISTRY OF CATTLE FEEDING 



Animal Fats. 



Kt. Kt. 



Goose fat 9'345 



Duck fat 9-324 



Butter fat 9-398 



Horse fat 9'4io 



Oxen fat 9'357 



Sheep fat 9-406 



Pig fat 9-380 



Rape seed oil .... 9-619 

 Poppy seed oil . . . . 9*442 

 Olive oil 9-328 



Vegetable Fats. 



Kt. Kt. 



Ether extract of various 



seeds 9'4*>7 



Straw 8-198 



Carbohydrates. 

 Kt. Kt. 



Starch 4-183 



Cellulose 4*185 



Dextrine 4-112 



Inulin 4'I34 



Glycogen 4*191 



Arabinose 3"7 22 



Glucose .... . 3-743 



Fructose 3755 



Cane sugar 3'955 



Lactose 3*952 



Maltose 3'949 



N.B. The above figures may be read as kilo-calories per gram, 

 instead of kt. per Ib. 



I kilo-calorie (l C.) 0*0022 kilo-pound-units. 

 i kilo-pound-unit (I kt.) = 454*0 kilo-calories. 



It will be seen from the figures given in the table above 

 that there is not much difference in the heat of combustion 

 of the several kinds of protein. The highest that of plant 

 fibrin is 5*918 kt. and the lowest (excepting peptone and 

 wool) that of muscle is 5*663 kt. The mean of these two, 

 5*79 kt., may be taken as the average heat of combustion of 

 the proteins. 



The heat of combustion of the fats varies from about 

 9*3 to 9*6 kt., but that of straw is only 8*2 kt. The average 

 for animal fats and those of oily seeds is generally taken as 

 9-4 kt., for those of cereals and other seeds 9*0 kt., and for 

 hay, straw, and coarse fodders generally 8*5 kt. 



The bihexose sugars have a slightly higher value than the 

 hexoses, and that of the arnyloses or polysaccharides is still 

 higher. The figure 4*1 kt. is generally taken as the average 

 for all the carbohydrates, but when sugary foods, such as 

 turnips, molasses, etc., are to be compared with those which 



